>The algorithms we use are based on years (literally) of research and part of a doctor thesis. Was this published somewhere? It'd be interesting to read. On 26 May 2014 10:12, "Mark Fisher" <[email protected]> wrote:
> A response from Butterfly's Marc Forderer via Swift Avionics. > > Dear Mike and Bernard > > Both of you wrote us the same forum post. We would prefer not getting > involved into forums discussions. Her’s the (short-ish) answer. > > We are using AHRS computed data to determine airflow around the aircraft > in realtime. We do this using our inertial platform inside our sensor unit. > The algorithms we use are based on years (literally) of research and part > of a doctor thesis. The horizontal component is wind, the vertical is what > we call "vertical air mass“ (VAM). > > The advantage of this new computation method is that horizontal energy > addition (in gusts) does not have influence on VAM readings. > > We have a mixing method that allows the user to blend in normal pressure > sensor (TEK) based „Netto Vario“ signals into the VAM readings. If your > installation is not perfect (= AHRS won’t work very accurately) or if you > prefer not to use the new data but like your old fashioned netto better > (with gust induced energy changes), then you can set it to 50% to mix it or > even 0%. > > The standard setup is 100%, that means 0 conventional and 100% AHRS based > data. We are very confident in this new technology and its fun to use. We > don’t use just some Accel/Gyro data and mix them in some way to tell people > its cool. Actually most users fly with 100%. > > Instantaneous wind makes a huge difference to your flying, even if not > flying in mountainous regions where the advantages are obvious. The new > wind indication helps you to locate thermals or convergences in flatland > areas as it reacts to smallest local airflow/wind differences. > > We have come a long way bringing this technology to the market and making > it available to many pilots in different aircraft. We have had quite some > troubles in the beginning, but this is not unusual. If you want to bring > new technologies to the market , you must know about the pain you will go > through initially. > > We are thrilled by the possibilities the system offers and love flying > with it, our customers do so, too. > > *Something you don’t have to write in the forum but its obvious:* Old > technology vario manufacturers love to tell people that it does not help > you flying or does not work. Now that its proven to work (ask people flying > with it) they love to tell people how difficult it is to install it. I must > admit that installation requires good care and some hours worth of time. > But fly with one, you will see that its worth it. > > Cheers > Marc > > > > -- > Mark Fisher > Managing Director > Swift Performance Equipment > Unit 2, 1472 Boundary Rd > Wacol 4076 > Australia > Ph: +61 7 3879 3005 > Fax: +61 7 36076277 > www.spe.com.au > > > > > > _______________________________________________ > Aus-soaring mailing list > [email protected] > To check or change subscription details, visit: > http://lists.internode.on.net/mailman/listinfo/aus-soaring >
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